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以哈尔滨呼兰区某地含高浓度铁锰地下水为处理对象,模拟实际情况中突发性Fe~(2+)污染对成熟滤柱除锰效果的影响。分别进行了曝气失效,Fe~(2+)浓度增大,滤速增大实验。实验结果表明:曝气失效的滤柱受Fe~(2+)污染后,出水锰增加,恢复曝气,6d后滤柱恢复除锰能力,出水锰达标(锰含量小于0.1mg/L);Fe~(2+)浓度从0.58mg/L逐步增加至2.09mg/L时,滤柱出现出水锰不达标情况,恢复至上一浓度1.56mg/L时,经过4d,出水锰达标;滤速从1m/h逐渐增大到5m/h,出水锰不达标,恢复至上一速度4m/h,经过7d,出水锰达标。
A high concentration of Fe-Mn groundwater in a certain area of Hulan District of Harbin was used as a treatment target to simulate the effect of unexpected Fe 2+ contamination on the effect of manganese removal by mature filter. The experiments of aeration failure, increasing of Fe ~ (2+) concentration and increasing of filtration rate were carried out respectively. The experimental results showed that the effluent manganese increased after the contaminated filter column was contaminated by Fe 2+, aeration was restored, and the manganese column was restored after 6 days, and the effluent manganese reached the standard (manganese content less than 0.1 mg / L). When the concentration of Fe 2+ increased gradually from 0.58mg / L to 2.09mg / L, the effluent manganese did not reach the standard when the concentration of Fe 2+ increased from 1.58mg / L to 1.56mg / L. After 4 days, 1m / h gradually increased to 5m / h, effluent manganese is not up to the last speed 4m / h, after 7d, the effluent manganese standard.